batman-adv/files/compat-hacks.h

   1 /* Please avoid adding hacks here - instead add it to mac80211/backports.git */
   2
   3 #undef CONFIG_MODULE_STRIPPED
   4
   5 #include <linux/version.h>      /* LINUX_VERSION_CODE */
   6 #include <linux/types.h>
   7
   8 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
   9
  10 #define dev_get_iflink(_net_dev) ((_net_dev)->iflink)
  11
  12 #endif /* < KERNEL_VERSION(4, 1, 0) */
  13
  14 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)
  15
  16 #include <linux/netdevice.h>
  17
  18 #define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info) ({\
  19         BUILD_BUG_ON(upper_priv != NULL); \
  20         BUILD_BUG_ON(upper_info != NULL); \
  21         netdev_set_master(dev, upper_dev); \
  22 })
  23
  24 #elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
  25
  26 #include <linux/netdevice.h>
  27
  28 #define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info) ({\
  29         BUILD_BUG_ON(upper_priv != NULL); \
  30         BUILD_BUG_ON(upper_info != NULL); \
  31         netdev_master_upper_dev_link(dev, upper_dev); \
  32 })
  33
  34 #endif /* < KERNEL_VERSION(4, 5, 0) */
  35
  36 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
  37
  38 struct sk_buff *skb_checksum_trimmed(struct sk_buff *skb,
  39                                      unsigned int transport_len,
  40                                      __sum16(*skb_chkf)(struct sk_buff *skb));
  41
  42 int ip_mc_check_igmp(struct sk_buff *skb, struct sk_buff **skb_trimmed);
  43
  44 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
  45
  46 #endif /* < KERNEL_VERSION(4, 2, 0) */
  47
  48 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
  49
  50 #define IFF_NO_QUEUE    0; dev->tx_queue_len = 0
  51
  52 static inline bool hlist_fake(struct hlist_node *h)
  53 {
  54         return h->pprev == &h->next;
  55 }
  56
  57 #endif /* < KERNEL_VERSION(4, 3, 0) */
  58
  59 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
  60
  61 #include <linux/ethtool.h>
  62
  63 #define ethtool_link_ksettings batadv_ethtool_link_ksettings
  64
  65 struct batadv_ethtool_link_ksettings {
  66         struct {
  67                 __u32   speed;
  68                 __u8    duplex;
  69         } base;
  70 };
  71
  72 #define __ethtool_get_link_ksettings(__dev, __link_settings) \
  73         batadv_ethtool_get_link_ksettings(__dev, __link_settings)
  74
  75 static inline int
  76 batadv_ethtool_get_link_ksettings(struct net_device *dev,
  77                                   struct ethtool_link_ksettings *link_ksettings)
  78 {
  79         struct ethtool_cmd cmd;
  80         int ret;
  81
  82         memset(&cmd, 0, sizeof(cmd));
  83         ret = __ethtool_get_settings(dev, &cmd);
  84
  85         if (ret != 0)
  86                 return ret;
  87
  88         link_ksettings->base.duplex = cmd.duplex;
  89         link_ksettings->base.speed = ethtool_cmd_speed(&cmd);
  90
  91         return 0;
  92 }
  93
  94 #endif /* < KERNEL_VERSION(4, 6, 0) */
  95
  96 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
  97
  98 #define netif_trans_update batadv_netif_trans_update
  99 static inline void batadv_netif_trans_update(struct net_device *dev)
 100 {
 101         dev->trans_start = jiffies;
 102 }
 103
 104 #endif /* < KERNEL_VERSION(4, 7, 0) */
 105
 106
 107 #include_next <linux/netlink.h>
 108
 109 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
 110
 111 #include_next <net/netlink.h>
 112
 113 static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff *skb);
 114
 115 static inline int batadv_nla_align_64bit(struct sk_buff *skb, int padattr)
 116 {
 117         if (batadv_nla_need_padding_for_64bit(skb) &&
 118             !nla_reserve(skb, padattr, 0))
 119                 return -EMSGSIZE;
 120
 121         return 0;
 122 }
 123
 124 static inline struct nlattr *batadv__nla_reserve_64bit(struct sk_buff *skb,
 125                                                        int attrtype,
 126                                                        int attrlen, int padattr)
 127 {
 128         if (batadv_nla_need_padding_for_64bit(skb))
 129                 batadv_nla_align_64bit(skb, padattr);
 130
 131         return __nla_reserve(skb, attrtype, attrlen);
 132 }
 133
 134 static inline void batadv__nla_put_64bit(struct sk_buff *skb, int attrtype,
 135                                          int attrlen, const void *data,
 136                                          int padattr)
 137 {
 138         struct nlattr *nla;
 139
 140         nla = batadv__nla_reserve_64bit(skb, attrtype, attrlen, padattr);
 141         memcpy(nla_data(nla), data, attrlen);
 142 }
 143
 144 static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff *skb)
 145 {
 146 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
 147         /* The nlattr header is 4 bytes in size, that's why we test
 148          * if the skb->data _is_ aligned.  A NOP attribute, plus
 149          * nlattr header for next attribute, will make nla_data()
 150          * 8-byte aligned.
 151          */
 152         if (IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8))
 153                 return true;
 154 #endif
 155         return false;
 156 }
 157
 158 static inline int batadv_nla_total_size_64bit(int payload)
 159 {
 160         return NLA_ALIGN(nla_attr_size(payload))
 161 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
 162                 + NLA_ALIGN(nla_attr_size(0))
 163 #endif
 164                 ;
 165 }
 166
 167 static inline int batadv_nla_put_64bit(struct sk_buff *skb, int attrtype,
 168                                        int attrlen, const void *data,
 169                                        int padattr)
 170 {
 171         size_t len;
 172
 173         if (batadv_nla_need_padding_for_64bit(skb))
 174                 len = batadv_nla_total_size_64bit(attrlen);
 175         else
 176                 len = nla_total_size(attrlen);
 177         if (unlikely(skb_tailroom(skb) < len))
 178                 return -EMSGSIZE;
 179
 180         batadv__nla_put_64bit(skb, attrtype, attrlen, data, padattr);
 181         return 0;
 182 }
 183
 184 #define nla_put_u64_64bit(_skb, _attrtype, _value, _padattr) \
 185         batadv_nla_put_u64_64bit(_skb, _attrtype, _value, _padattr)
 186 static inline int batadv_nla_put_u64_64bit(struct sk_buff *skb, int attrtype,
 187                                            u64 value, int padattr)
 188 {
 189         return batadv_nla_put_64bit(skb, attrtype, sizeof(u64), &value,
 190                                     padattr);
 191 }
 192
 193 #endif /* < KERNEL_VERSION(4, 7, 0) */
 194
 195
 196 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
 197
 198 #include_next <linux/cache.h>
 199
 200 /* hack for netlink.c which marked the family ops as ro */
 201 #ifdef __ro_after_init
 202 #undef __ro_after_init
 203 #endif
 204 #define __ro_after_init
 205
 206 #endif /* < KERNEL_VERSION(4, 10, 0) */